What’s the deal?!

Guys my boyfriend have been acting weird lately. So his phone is broken so we’ve been keeping contact through Facebook messenger. He’s just been acting funny lately like his energy is off. He use to hit me up all the time to check in and now he’s not hitting me up all the time but he’s active on Facebook messenger... my friend lives with him because she dates his brother so they all live together. She says he doesn’t leave the house or anything unless he’s running errands with her bf. So I know he’s not cheating . But like what else could it be. He’s just been going M.I.A randomly. Then tries to hit me up like everything’s cool. Not feeling it and something up...He only acts distant like this when something is going on or if he’s going through something. I know he’s struggling right now but Ive been down to help him since day one, I’m an hour away at school so I know that could be annoying. I’m about to graduate in 2 months and I’ve been stressing a lot lately and he’s honestly adding to it. Like at this point I don’t know whether to keep it strong and push through the rough patch or to just let him go...💕😩🤦🏼‍♀️. Ladies ? Talk to me!